Inhibitory effect of SAMHD1 on production of HBV DNA / 中国免疫学杂志

ABSTRACT

Objective:To study the expression levels of SAMHD1 in different liver cancer cells and the inhibition of HBV DNA production by SAMHD1. Methods:SAMHD1 mRNA and protein levels in Jurkat,THP-1,HepG2,HepG2. 2. 15 and Huh7 were detected by Real-time quantitative PCR and Western blot. SAMHD1 expression in HepG2. 2. 15 was increased by transfecting SAMHD1 over ex-pression vectors or was inhibited by transfecting SAMHD1 specific shRNA, and then HBV DNA levels were detected. The effect of different dNTP concentration on HBV DNA production was detected also. Results:SAMHD1 were highly expressed in liver cancer cells. Decreased SAMHD1 expression could enhance HBV DNA production by 2. 3-2. 8 times,and increased SAMHD1 expression could inhibit HBV DNA levels by 3 times(P<0. 01). Increased dNTP concentration could enhance HBV DNA production and counteract the inhibitory effect of SAMHD1. Conclusion:SAMHD1 can inhibit the production of HBV DNA in liver cancer cells by decreasing dNTP concentration.